22721333556101 has 4 divisors (see below), whose sum is σ = 22722720626604. Its totient is φ = 22719946485600.

The previous prime is 22721333556049. The next prime is 22721333556133. The reversal of 22721333556101 is 10165533312722.

It is a Cunningham number, because it is equal to 4766690²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2774128900 + 22718559427201 = 52670^2 + 4766399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22721333556101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22721333556161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693510680 + ... + 693543441.

It is an arithmetic number, because the mean of its divisors is an integer number (5680680156651).

Almost surely, 2^{22721333556101} is an apocalyptic number.

It is an amenable number.

22721333556101 is a deficient number, since it is larger than the sum of its proper divisors (1387070503).

22721333556101 is a wasteful number, since it uses less digits than its factorization.

22721333556101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387070502.

The product of its (nonzero) digits is 226800, while the sum is 41.

Adding to 22721333556101 its reverse (10165533312722), we get a palindrome (32886866868823).

The spelling of 22721333556101 in words is "twenty-two trillion, seven hundred twenty-one billion, three hundred thirty-three million, five hundred fifty-six thousand, one hundred one".